mediator Syllabification: (me·di·a·tor)Pronunciation: /ˈmēdēˌātər/Translate mediator | into French | into German | into Italian | into Spanish Definition of mediator noun a person who attempts to make people involved in a conflict come to an agreement; a go-between: the government appointed a mediator to assist in finding a resolution to the disputeDerivatives mediatoryPronunciation: /ˈmēdēəˌtôrē/ adjective mediator in other Oxford dictionaries Definition of mediator in the British & World English dictionary